Form for septic tanks



M. c. NOTTINGHAM FORM FOR sEPTIc TANKS March 31; 1942.

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f w, Rm Y y J7 o m J.. W W\ ..1/ L/ v M Patented Mar. 31, 1942 UNITEDSTATES PATENT OFFICEI 2,278,089 f FORM Fon sErlo TANKS Mark o.Nottingham, Temple city, Calif.

Application October 7, 1940, Serial No. 360,096

2 Claims.

My invention relates to forms for septic tanks. An object of theinvention is to provide a form whereby the septic tank 'may be poured inan inverted form with the open end downward.

Still other objects of the invention are to provide such forms that areconvenient in use, of improved structure, easily assembled and easilyknocked down, economical in manufacture, having superior serviceability,relative simplicity, inexpensiveness in construction and generalefficiency.

The invention also com-prises novel details of construction and novelcombinations and arrangements of parts, which will more :fully appear inthe course of the following description. However, the drawing merelyshows and the following description merely describes one embodiment ofthe present invention, which is given by way of illustration or exampleonly.

.In the drawing, like reference characters designate similar parts inthe several views.

Figure 1 is a longitudinal section through an embodiment of theinvention, taken on the line I-I of Figure 2.

Figure 2 is a transverse section, taken on the line 2-2 of Figure l.

Figure 3 is a broken elevation of an end of the embodiment, viewing theside thereof.

Figures 4 and 5 are enlarged details of parts of Figure 2.

Fig. 6 is an enlarged, broken section taken on the line 6-6 of Fig. 1.

Referring more in detail to the drawing, the reference numeral 1indicates a wooden base upon which the form is mounted. Bulkheads 8 and9 are supported on the base l.

The bulkheads respectively abut against the inner side of channelmembers I and I2 at the ends of the form. Cleats I3 maintain therigidity of the bulkheads. The channel members I0 are curved to fit backto back with channel members I4 and I5, with sheet metal walls IB andI'I disposed between the fitting, curved backs of the said channelmembers. The channels of the members I0 face inwardly of their curvesand the channels of the members I4, I5 face outwardly with respect totheir curves.

At the bottom of the form a wood beam I8 is Aarranged between the sheetmetal wall I6 and the lower anged end 2| of the channel member I4. Around headed bolt I9, having a nut in the channel member I4, maintainsthe sheet metal wall I6, the beam I8 and the flange 2l in relativepositions.

The top 24 of the sheet metal wall I6 is bent around a strip 22-preferably of Wooden material. A bolt 23 holds the folded end 24 aroundthe upper end of the channel member I4. Boards 25 extend substantiallyfrom end to end of the form, aiding in strengthening the form at the topthereof.

The construction at the opposite side is similar to that just described,to wit, a beam 26 is disposed between flange 2l at the -bottom of thechannel member I5 and the lower end of the sheet metal wall I'I. Thebeams I8 and 26 are arranged substantially parallel, as are the flangedends 2| and 21. Moreover, a strip 28 is arranged in upper folded end 29of the sheet metal side I'I, while bolt 30 holds said assembled partstogether at the top of the form. A beam 3 I extends lengthwisesubstantially from end to end on the outside of the form.

A `rod 32 clamps outer walls of the form together, at the top thereof.One end of the rod 32 is hooked over the channel I5, as shown at 33. Theother end of the rod 32 carries an adjusting head 34 held in position bya set screw 35. A flared end 36 of the head 34 engages the channel I4.

Means for maintaining the outer walls of the form, substantially at thehorizontal mid-point thereof, comprises slidably adjustable links 3I and38 that are held together in adjusted positions by adjusting screws 39.The adjusting screws 39 bolt together overlapping ends of the links 3'Iand 38. The link 31 has a hooked end 40, while the link 38 has a hookedend 4I. These hooked ends engage the channels I4 and I5 respectively.

The bulkheads 8 and 9 comprise outer walls for forming the ends of theseptic tank. The means for providing the inner walls for forming theends of the septic tank comprise substantially flat sections 42 and 43that have their outer edges curved in opposite directions. Ribs 44 and45 respectively strengthen the sections 42 and 43. An intermediatespacer section 46 separates the sections 42 and 43. Abutting flanges 41and 48 on the sections 42 and 46 are held together by pins 49, which areheld in 4place by wedges 50. Abutting flanges 5I and 52 on the sections46 and 43 respectively are held together by pins 53, which aremaintained in place by wedges 54.

Channel members 55 and 55 face their channels inwardly and are arrangedto strengthen the inner wall of the form. The lower ends 5'I and 58 ofthe channel members 55 and 56 are curved around beams 59 and v60 thatrest upon the base 1.

The inner, sheet metal wall members 5I and 62, of the inner wall of theform, have lower, parallel flanges 63 and 64 on the outside of the beams59 and 60, with respect to the ends 51 and 58, Upper abutting edges ofthe wall members 6| and 82 are held together by angle irons 65 and 66which are held together by pins 61 and wedges 68.

Anchor pieces 69 and l0 are fastened to the base 1, while wedge blocks1I- and 'I2 are wedged between the anchor pieces 69, 10 and the lowerflanges 2| and 2l, whereby the lower portions of the mold are heldagainst spreading. It is to be understood that the channel ends 51 and58 are spaced apart in order to provide the normally top opening of thenished septic tank. Bars 'I4 having hooked ends 15 hooking into channelirons 16 and 'il at the bottom of the form tend to maintain the lowerends of the form against separating. Bolt 'i8 fastens the angle iron 16to the `beam 59 and to flange 63 of the inner sheet metal wall of theform. A series .of external channel irons 'I3 strengthen the outerperiphery of the outer wall.

In the use of the invention, the pins and wedges are employed to fastenthe inner, end wall sections together and to fasten the inner, sheet`metal walls together at their upper abutting edges. The outer wallmembers are then placed spaced relation to the inner wall members, inthemanner described.

Woven wire 3D is then arranged in the space between the inner and outerWalls of the form, so that such wire becomes embedded in the concretethat is poured into and hardens in place in the form. Wood blocks 8l, 82and 83 are arranged to make suitable inlet passage and outlet in thenished article. Spaced walls 84 and 85 between the ends of the forms arearranged to form a partition within the tank. Ihe block 82 forms a,passage through this partition. The block 82 is arranged substantiallyabove the level .of the openings provided by the blocks Bland isfinished. Lids for septic tanks formed in the I present mold areseparately cast.

The removal of the form from the concrete, after it has hardened, is areversal of the assembly of the parts hereinbefore described, which isbelieved to be clear from the foregoing description.

While I have illustrated and described what I now regard as thepreferred embodiment of my invention, the construction is, of course,subject to modifications without departing from the spirit and scope ofmy invention. I, therefore, do not wish to restrict myself to theparticular form of construction illustrated and described, but desire toavail myself of all modifications which may fall within the scope of theappended claims,

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1.,In a form for casting tanks, outer wall members spaced apart at thetop thereof to form an opening therebetween and having externallyreverting flanges along said opening to form smooth side edges thereforand external lengthwise ribs, reinforcing members along the inner andouter surfaces .of said wall members at the ends thereof, bulkheads atopposite ends .of the form inwardly of, and against, the innerreinforcing members, clamping bolts extending transversely through thereinforcing .members externally of the bulkheads, and beams lengthwiseof the said wall members and wedged lby said clamping bolts inreinforcing relation against the lengthwise ribs of the members, to thussimultaneously clamp the wall members against the bulkheads and bracethe `upper flanged edges of the side members.

2. In a form for casting tanks, outer Wall members spaced apart at thetop thereof to form a top opening therebetween and having externallyreverting flanges along the sides of said opening to form smooth sideedges, means in connection with Vsaid flanges to form rigid externalribs, reinforcing channel members against the inner and outer surfacesof said outer wall members at the ends thereof, end bulkheads `withinand between said outer wall members against the inner reinforcingmembers, beams externally and lengthwise of the outer Wall members andwith their upper longitudinal edges abutting the said external ribs, andclamping bolts extending through the channel members of the two outerWall members Yfor clamping `the same against the edges -of the bulkheadsand also engaging the lower edges of the said beams 'to conne the latteragainst said ribs `and thus reinforce the edges of the outer wallmembers along said opening.

MARK C. NOTTINGHAM.

